How Do Braces Move Teeth?
Teeth move in response to the forces we apply to them. Brackets are the attachments that act as a holder for the wires. Brackets are engaged on the wire with gray, clear, or colored ligatures onto a wire that connects the brackets to each other and provides the forces to steer the teeth in the proper direction. We also work with and offer braces that require no ligature ties at all that are called “self-ligating brackets.” During tooth movement, wires and elastics are what actually move the teeth. We have three-dimensional control over the movement of the teeth based upon manipulations of the wire. Sometimes patients will need to wear elastics or rubber bands, or use functional appliances and removable appliances.

What they look like:
About Ligature ties
Ligatures keep the wire in the brace in order for the teeth to move. Even though they can be fashionable ways of accessorizing and a way to express yourself and celebrate, they are an essential part of the orthodontic appliances.